Grate-bar



(No Model.)

y A. HRLNDIER.

` GRATB BAR. No. 305,589.` vPateped Sept. 2,3, 1884.

M c, u. m w .N z

UNITE STATES ATENT turen.

AUGUST HAAnLANDn-n, or ALLEGHENY, PENNSYLVANIA.

eRATE-BAR. n

rl?ECIlc"IC`JA'I'IO1\T forming part of Letters Patent No. 305,589, dated September 23, 1884.

Application filed December 4, 1853, (No model.) i

ira all whom t may concern,

Be it known that I, AUGUsT HAARLANDER,

` of Allegheny, in the county of Allegheny and Figure l-is a plan View of a number of my grate-bars in position.

Fig. 2 is a side elevation of one bar, and Fig. 3 is a transverse section of Fig. 2. j

This invention has for its object an improved form of grate-bar designed to give a proper support for the fuel, while providing a large amount of air-space for combustion, and to effectually prevent all injurious warping of the bar and consequent disturbance of the original relations of one bar to its neighbors;

rIhe invention consists in the peculiarities of form and arrangement hereinafter fully described and claimed.

The drawings show the form of the bars and their relations when placed in a group for use. Each bar is composed of a narrow central web, a, of considerable depth, having on its two sides or lateral faces the alternating vertical ribs c, of a triangular form, having the outer edge practically a knife-edge, that is made as sharp as can be done in casting. The ribs c thus alternate on the respective fiat faces of the body or web ct, the flat unribbed portion at one point having a rib on the. opposite side of thebar. `These ribs are made ot' a projecting width nearly or about equal to that of the body or web, and their extremities present a mere edge, as stated.. Each bar has an enlarged end, d, or projection, formed with matching tongues c and grooves f, arranged reversely on the respective ends of the bar. rl`he width of the ends d -is such that when the bars are placed side by side to form the grate the projections or enlargements d touch each other and prevent any one bar from displacement laterally, and

the tongues e and grooves f prevent all endwise creeping or motion of the respective bars of the grate. rlhe width of the enlargements or projections d is such that when two bars are laid side by side in proper position the sharpedged ribs of each bar reach over to and touch the dat surface of the other bar between its ribs throughout the length of the whole bar a. number of diamond-shaped airspaces evenly distributed over the whole surface of the grate, with but a slight thickness of metal in all lateral and angular directions. The slighttaper usually given the pattern, in order to draw from the sand in molding, gives all the required clearance below the top surface for the passage of ash. The ribs c of every bar are in vcontact with the face of the adjacent bar or bars, land hence the usual distortion and dis- 4placement of original conditions by intense heat cannot take place, and the tendency to such buckling or warping is lessened by the fact that the Contact between bar and bar is on a mere line-the edges of ribs c, which are surrounded by airspaces, and are kept coinparatively cool.

I prefer to form each bar with a longitudi- By such arrangement I create a large nal groove, fi, on the topsurface of the web a, l

as shown, which reduces the surface in contact with the fuel and lessens the tendency of clinkers to adhere, and also forms a repository for` line ashes, and thus preserves the bar itself from the heat.

I claim as my invention The grate-bar herein described, comprising the narrow central web, c, having the alternatelydisposed sharp-edged vertical ribs c and end enlargements, d, soproplortioned, substantially as described, that when two or more bars are laid in position the sharp edges of the ribsof one bar will touch the lat intermediate portions of the adjacent bar.

In testimony that I claim the foregoing as my own I have hereto affixed my signature iu presence of two witnesses.

AUGUST I-IAAELANDER.

VtnesSes:

T. J. McTIGHn, T. J. PATTERSON. 

